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After gravity has taken it's toll upon the male genitalia a man can now use his scrotum and testicles as a wreaking ball. Assuming he has two, one needs to bounce back into the other testicle sending it hurdling towards the desired object. Thus the pendulum effect.
Bro: How did you get that hole in your bathroom wall?

You: I realized I forgot a towel when I got out of the shower so I was going to helicopter myself dry with my giant schlong but I accidentally pendulum smacked the wall.

Bro: Ouch!
by Mr.Al January 16, 2015
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